Question

两道英文数学题，求助！

1)d=5.03894 and A is the decimal expression for d rounded to the nearest thousandth. question: the number of decimal places where d and A differ

2)to reproduce an old photograph, a photographer charges x dollars to make a negative, 3x/5dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints, if 45dollars is the total charge to make a negative and 20 prints from an old photograph, what is the value of x?
A3
B3.5
C4
D4.5
E5

Answer 1

1)d = 5.03894十进制表达式和一个是为d圆整到1000.问题:十进制的地方的数量d与不同之处
　　
　　2)复制旧相片,一名摄影师费x美元来制造消极,3 / 5美元为每一个光之语首10个印刷品和x / 5美元为每个打印超过10印刷品,如果45美元总费用作出负面和20从旧相片印刷品的价值,是什么职务?
　　A3
　　B3.5
　　C4
　　D4.5
　E .5
我的数学水平解答不了，只能帮你翻译下了